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Fig. 1

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Presentation of the GHOST testbed. Left: optical layout of the GHOST bench, with the following symbols: L: lens, BS: beam splitter, DM: deformable mirror, SLM: spatial light modulator. See text for more details. The modulation mirror used for the PWFS and located between BS3 and Lw f sl is not represented in this scheme. Right: picture of the testbed on March 8, 2023.

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